Current limiting behavior in three-phase transformer-type SFCLs using an iron core according to variety of fault
- 作者：Yong-Sun Cho ; Byung-Ik Jung ; Kyoung-Hun Ha ; Soo-Geun Choi ; Hyoung-Min Park ; Hyo-Sang Choi ; hyosang@chosun.ac.kr
- 关键词：Induced coupling ; Neutral line ; Three-phase transformer-type SFCL
- 刊名：Physics Procedia
- 出版年：2012
- 期刊代码：P128_18753892
- 类别：ph
- 出版时间：2012
- 卷：27
- 期：Complete
- 页码：392-395
- 文件大小：4716 K
摘要
To apply the superconducting fault current limiter (SFCL) to the power system, the reliability of the fault-current-limiting operation must be ensured in diverse fault conditions. The SFCL must also be linked to the operation of the high-speed recloser in the power system. In this study, a three-phase transformer-type SFCL, which has a neutral line to improve the simultaneous quench characteristics of superconducting elements, was manufactured to analyze the fault-current-limiting characteristic according to the single, double, and triple line-to-ground faults. The transformer-type SFCL, wherein three-phase windings are connected to one iron core, reduced the burden on the superconducting element as the superconducting element on the sound phase was also quenched in the case of the single line-to-ground fault. In the case of double or triple line-to-ground faults, the flux from the faulted phase winding was interlinked with other faulted or sound phase windings, and the fault-current-limiting rate decreased because the windings of three phases were inductively connected by one iron core.